package org.apache.solr.schema;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.apache.lucene.index.IndexReader;
import org.apache.solr.search.function.DocValues;
import org.apache.solr.search.function.FieldCacheSource;
import org.apache.solr.search.function.StringIndexDocValues;

import java.io.IOException;
import java.util.Map;

public class StrFieldSource extends FieldCacheSource {

	public StrFieldSource(String field) {
		super(field);
	}

	@Override
	public String description() {
		return "str(" + field + ')';
	}

	@Override
	public DocValues getValues(Map context, IndexReader reader)
			throws IOException {
		return new StringIndexDocValues(this, reader, field) {
			@Override
			protected String toTerm(String readableValue) {
				return readableValue;
			}

			@Override
			public float floatVal(int doc) {
				return (float) intVal(doc);
			}

			@Override
			public int intVal(int doc) {
				int ord = order[doc];
				return ord;
			}

			@Override
			public long longVal(int doc) {
				return (long) intVal(doc);
			}

			@Override
			public double doubleVal(int doc) {
				return (double) intVal(doc);
			}

			@Override
			public String strVal(int doc) {
				int ord = order[doc];
				return lookup[ord];
			}

			@Override
			public String toString(int doc) {
				return description() + '=' + strVal(doc);
			}
		};
	}

	@Override
	public boolean equals(Object o) {
		return o instanceof StrFieldSource && super.equals(o);
	}

	private static int hcode = SortableFloatFieldSource.class.hashCode();

	@Override
	public int hashCode() {
		return hcode + super.hashCode();
	};
}
